Machine for winding motors.



L. A. ALEXANDER. MACHINE FOB WINDING MOTORS.

APPLICATION FILED AUG. 11, 1909.

Patented Feb. 25, 1913.

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APPLICATION FILED AUG; 11, 1909.

' Patented Feb. 25, 1913.

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W7??? ass es L. A. ALEXANDER.

MACHINE POE WINDING MOTORS.

APPLIOATION FILED we. 11, 1909.

Patented Feb." 25, 1913.

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LOUIS A. ALEXANDER, OF TOLEDO, OHIO, ASSIGNOB TO THE F. BISSELL COMPANY,OF TOLEDO, OHIO, A CORPORATION OF OHIO.

MACHINE FOR WINDING MOTORS.

Specification of Letters Patent.

Patented Feb. 25, 1913.

Application filed August 11, 1909. Serial No. 512,843.

an annular core in the construction of Gramnie ring armatures.

In the winding of motors, it is essential that a definite number ofturns of wire should be placed in each coil, and that it should beuniformly wound with the successive convolutions as nearly parallel aspossi' ble and confined within definite space limits. Furthermore, asthe core is an unbroken ring, the winder must necessarily be of annularform, and provision must be made for quickly engaging and disengagingthe winder from the core. In connecessary conditions there are certaindithculties to be overcomefirst, the engagement and disengagement of thewinder with as it is being wound so as to form uniform layers; third,the stopping of the winding when the required amount of wirehas beenplaced in the coil, and, fourth, the reversal at the end of the layerwithout any hesitation in the motion, as this would allow the wires topile in the corners. The mechanism must be so arranged that the wear ofthe parts from constant use will not allow the machine to hesitate onthe end of the stroke for the above reason, and this last difiiculty isinherent in any form of purely mechanical movement. These ditiiculties Ihave overcome by the peculiar construction, arrangement and cooperationof the parts of my machine as will b'ie' more fully hereinafter setforth.

In the drawingsFigure 1 is a plan view; Fig. 2 is a sectional sideelevation; Fig. 3 is a perspective View of the electric switch; Fig. 4is a plan showing the adjustable connecting means for adjusting themovement of the carriage; Fig. 5 is an elevation of the brake; Fig. 6 isan elevation of the controlling switch therefor; and Fig. 7 is a diagramillustrating the arrangement of the electric circuits.

I11 general construction, my machine comprises a driversuch as the motorA, from which motion is transmitted through a shaft B and gear 0 to theannular winder D. Motion is also transmitted through a stepdown train ofgearing-such as the worm gear E, shaft I pinion G, and gear wheel H to ashaft I, for actuating the cooperating parts of the mechanism.

The winder D comprises a ring journaled .in a segmental bearing J, andprovided on its periphery with gear teeth K which mesh with the gear C.The ring is formed with a hinged segment I) which, when open, willpermit of engagement or disengagement :of the core to be wound, whichlatter is supported by a segmental holder L cut away ItOprovide'clearance for the winding. The hinge segment D of the ring isprovided .with a locking latch D on its inner face jwhich, when inengagement, will hold the ring in unbroken form.

struct-ing a: machine which will fulfil the M is a bobbin or spoolholder upon the ring D for carrying the wire, and N is an arm carryingsheaves N, over which the 'wire is fed and guided.

the core; second, the guiding of the wire In the winding of the coils,there must be a relative reciprocatory movement of the coreand thewinder, as the successive layers of wire are deposited, and thisreciprocation ,must be at a constant velocity without any delay at thepoint of reversal. The ordi- .nary mechanism employed for areciprocating movement-such, for instance, as a 'icrank and pitman, areinadequatefirst-,

because the velocity is not uniform, and, ;second, on account of slightlost motion ioccurring at the point of reversal. This Zwould result inthe piling up of the wire ;during the winding, instead of depositing itin uniform layers, which would be very Qobjectionable, With my improvedconstruction I have attained the desired results by providing twoseparate drivers moving in opposite directions at the same time anduniform velocity, together with instantaneously operating clutches bywhich the driven part may be alternately" coupled to said driver, soarranged so that any amount of wear on the various parts will in no wayaffect the accuracy of the reversal.

As shown, the holder L is the member which is reciprocated, and this ismounted upon a carriage L supported in ways L O is a rock arm forimparting the re ciprocatory movement to the carriage L. which isconnected to a rock shaft 0 mounted upon a base 0 so port-ed on a ballbearing Q Upon this shaft are sleeved two rotary members P P, which aredriyen constantly in opposite directions at uniform velocity preferablythrough the medium of a bevel gear wheel Q on the shaft I which mesheswith bevel gear teeth Q Q, on the members P P.

R R are clutch members secured to the shaft 0 adjacent to the members PP respectively and adapted to bev alternately and instantaneouslyengaged therewith.

To obtain the desired instantaneous operation of the clutches, they arepreferably of the magnetic type, and consist of a case formed ofmagnetic material, having annular ole pieces R and R, and anintermediate energizing coil R.

S is a disk-shaped armature, which is normall held in slight frictionalengagement with the pole pieces R and R and is coupled to rotate withthe adjacent sleeve member P or P. The frictional contact is maintainedby the tension of the spring S in the sleeve member, which bears on theend of the pin- S on the armature, said pin engaging an aperture in saidsleeve member and constituting the coupling connection for the samewlththe armature.

The construction just described is such that when the coils R are notenergized the sleeve members P P will revolve in opposite directionswithout imparting movement in either direction to the shaft 0. When,however, one of the coils R is energized the corresponding armature willbe instantaneously locked to the magneticmember, and, as the latter isfixed upon the shaft 0, this shaft will instantaneously receive motion,which will rock the arm 0 and will move the carriage L. This movementwill continue without interruption until the magnet is deenergized, andthe opposite magnet is energized, upon which there will be aninstantaneous reversal and uniform movement in the opposite direction.The timing of the reversal is dependent upon the opening and closing ofthe electric circuits which are controlled by an electric switch. Thisswitch is preferably operated by a rock arm T secured to the shaft 0,and is constructed as follows: T is an extension arm pivotally connected.to thearm T. T is a movable contact member also pivoted to the arm T,and carrying an insulated terminal contactUof the electric circuit. Uand U are cooperating contact members secured to an insulator support Umounted on the arm T. T are stops on ocaoea opposite sides of thecontact member T and secured to the arm T, which stops serve to limitthe movement of the contact arm T T is an extension of the arm T on theopposite side of its pivot, and Tf is a spring upon a link T", which isconnected to the arm T" and slidably engages an abutment T in the springat the outer endof the arm T. T are adjustable stops on opposite sidesof the outer end of the arm T for limiting its movement.

The above described construction constitutes a snap switch, which may beaccurately timed in its operation by proper adjustment of the stops TThe switch is operatedfirst, by the movement of the arm T, which isrocked with the shaft 0. This movement of the arm T will carry wit-h itthe pivot T to which the arm T and contact member T are pivoted, but, byreason of the stops T the outer end of the arm T is held stationary.This will cause a change in the angular relation of the link T and armT, compressing the spring T and continuing until said link T and arm Thave just passed the position of exact alinement. During this movement,the contact member T is also moved, but the contact U, which is bearingupon one of the cooperating contacts U. U will not be moved sufiicientto break its connection until the posit-ion of alin'ement of the link Tand arm T is reached. Immediately following this. the'tension of thespring T will cause the snapping'of the arm T through the remainder ofits movement, breaking one circuit and establishing the other, andthereby correspondingly deenergizing and energizin the magnets R. Whilethe operation of t e switch controls the timing of the reversal, theamplitude of movement imparted to the carriage L and holder L isdependent upon the length of the rock arm 0. To provide adjustment ofthis movement, the rock arm 0 is coupled to the carriage L by anadjustable pivot. As shown, this pivot V engages a slot V in the arm 0,and is radially adjustable with respect to said arm by engaging with athreaded stem V secured in a bearing V on the carriage, and rotated by athumb wheel V. This construction permits of altering the radial lengthof the arm 0 and cone spondingly increasing or decreasing the amplitudeof movement of the carriage.

With the mechanism thus far described, it will be understood that duringthe rotation of the winder ring D the holder L, for the core, will bereciprocated and the amplitude of movement and timing of reversals isadjusted so as to deposit uniform layers of wire in the coil about thecore. To limit the amount of wire thus wound, movement of the mechanismmust be arrested, and thisis preferably accomplished by a brakeW uponthe main shaft B. This brake is preferably electrically operated, and,as shown, consists of a brake strap W, embracing a brake wheel on theshaft, and having one end connected with the armature W of anelectricmagnet VV The parts are so adjusted that whenever the magnet isenergized the strap will be tightened upon the drum sufficiently toovercome the inertia of the mechanism as well as the driving force ofthe motor and stop the operation. The motor circuit is preferablysimultaneously opened to the operation of a trip arm. lV on the armatureit, which actuates a suitable circuit controlling switch, notshown. Theoperation of the magnetic brake is timed by any suitable mechanismdriven from the shaft B, but, as shown, the control mechanism isarranged upon the shaft l. Specifically, this mechanism consists of adisk X mounted on said shaft I,-which has arranged in its periphery oneor more notches X. X is a lever having a projection X bearing againstthe periphery of the disk X, and X is an electric contact carried by thefree end of the lever X This contact is normally against a contact X andis separated from another contact X the parts being in this position aslong as the projection X contacts against the periphery of the disk X,but, whenever in the rotation of the disk, one of the notches Xregisters with the projection, the lever is permitted to move, breakingthe cont-acts X and X and losing the-contacts X and X. The contacts Xand X are included in the circuits of one coil R while the contacts Xand X, when closed, out in the brake magnet W in series with said magnetR Consequently, whenever this latter circuit is closed the brake will beoperated, which will arrest further movement of the mechanism.

In the complete operation of the machine, the core to be mounted isfirst placed in engagement with the holder L, being inserted into thewinding ring Dby opening the hinge segment D thereof. The segment isthen closed and locked, and a bobbin of wire to be wound is engaged atM, the end of the wire being drawn about the sheaves N. The motor A isthen set in operation which, through the transmission train, willrevolve the winder D and simultaneously rotate the sleeves P P inopposite directions upon the shaft 0. One of these sleeves will becoupled to the shaft by its electro-magnetic clutch R, and thus motionwill be communicated to the rock arm which moves the carriage L upon theways L The rate of this movement is such that during each completerevolution of the winder the carriage moves a distance equal to thethickness of the wire, and consequently the wire will be wound uniformlyin a close coil from one end to the other. Upon reaching the end of thefirst layer, the snap switch, operating automatically lever X and theclosing of the magnetic brake circuit. This circuit is not, however,closed until the snap switch reverses to energize the particular magnetR with which the brake magnet W is in series, and thus motion isarrested at the tnd of a complete layer of the coil, and not the instantthat the lug X drops into the notch X. The operator then adjusts thecore in its holder into a position for receiving another coil, anotherbobbin of wire is placed.

in the winder, and the operation repeated, this continuing until theentirecore is wound. The hinge segment D is then opened, the wound coreremoved, and am other core placed in engagement with the holder.

What I claim as my invention is:

1. The combination with a winder and a workholder, of means forlaterally reciprocating the one with respect to the other comprising areciprocatory member, two constantly driven members traveling inopposite directions, and means for alternatively coupling said drivenmembers to said reciprocatory' member. 2. The combination with a winderand a workholder, of means for laterally reciprocating the one withrespect to the other, comprising two constantly drivenoppositely-traveling members, a reciprocatory member adapted foralternative connection with said driven members, and automatic means forsimultaneously reversing the engagement between said reciprocatorymember and driven members at the limits of the reciprocation.

3. The combination with a winder and a workholder, of means forreciprocating the one with respect to the other, comprising two membersconstantly driven in timed relation to the rotation of said winder, andin opposite directions, an adjacent rotary member, means connected withsaid member for translating the movement thereof into a reciprocatorymotion, and automatic alternatively-operating clutches for coupling saidoppositely rotating members respectively with. said adjacent rotarymember.

4. The combination with a winder and a workholder, of means forlaterally reciprocatmg the one with respect to the other,

bers constantly driven in timed relation to the movement of the winder,a reciprocatory carriage, a member for actuating the same, and means foralternatively coupling said oppositely-rotating members with saidcarriage-actuating member.

5. The combination with a Winder and a workholder, of means forreciprocating the one with respect to the other, comprising twooppositely-traveling members constantly driven in timed relation to therotation of said Winder, a carriage for the reciprocatory member,mechanism for actuating said carriage in opposite directionsrespectively by said oppositely-traveling members, and meansautomatically operating at the limits of travel of said carriage forsimultaneously disconnecting said carriage-actuating member from one ofsaid driven members and for connecting the same with the other of saiddriven members.

6. The combination with a winder and a workholder, of means forreciprocating the one with respect to the other, comprising twooppositely-traveling rotary members constantly driven in timed relationto the movement of said winder, a carriage for the reciprocatory member,a rotary member for actuating said carriage, and a pair ofelectro-magnetic clutches for alternatively coupling saidoppositely-driven members with said carriage-actuating member.

7. The combination with a winder and a workholder, of means forreciprocating the one with respect to the other comprising a carriagefor the reciprocatory member, a rock arm for actuating said carriage,two oppositely-traveling rotary members driven in timed relation to themovement of said winder, electromagnetic clutches for alternativelycoupling said oppositely-driven members with said rock arm, a switchcontrolling said clutches, and means automatically operating at thelimit of movement of said rock arm and carriage for automaticallyreversing said switch. I

8. The combination with a winder and a workholder, of means forreciprocating the one with respect to the other, comprising a carriagefor the reciprocatory member, a rock shaft, a rock arm on said rockshaft, having a radially-adjustable engagement with said carriage, twomembers sleeved upon said rock shaft constant-1y driven in oppositedirections in timed relation to the movement of said winder, clutchesfor alternatively coupling said oppositely-driven members with said rockshaft, and means automatically operating at the limits of the movementof said rock shaft for reversing said clutches.

9. The combination with a winder and a messes workholder, of means forreciprocating the one with respect to the other comprising a carriage,two oppositely-rotating members sleeved upon said rock shaft and drivenin timed relation to the movement of said winder, a pair ofelectro-magnetic clutches for respectively couplingsaidoppositely-driven members with said rock shaft, a switch foralternativelv energizing said magnetic clutches, and automatic means forreversing said switch at different points in the movement of saidrockshaft.

10. The combination with a winder and a workholder, of means forreciprocating the v one with respect to the other, comprising twomembers constantly driven in opposite directions in timed relation tothe movement of said winder, a carriage for the reciprocatory member,means for alternatively coupling said carriage with saidoppositelydriven members and for periodically automatically reversingthe coupling, a brake for arresting movement of the entire mechanism,and means automatically operating after a predetermined number ofrevolutions of'said winder for actuating said brake.

11. The combination with a Winder and a workholder, of means forlaterally reciprocating the one with respect'to the other, comprising areciprocating member, two constantly driven members traveling inopposite directions, and electrically operated means for alternatelycoupling said driven members to said reciprocating member.

12. The combination with a winder and a workholder, of means forlaterally reciprocating the one with respect to the other comprising areciprocating member, two const-antlv driven members traveling inopposite directions, electrically operated means for alternativelycoupling said driven members to said reciprocating member, andelectrically operated means operating after a predetermined number'ofrevolutions of said winder for arresting movement of the entiremechanism.

13. The combination with a winder and a workholder, of means forreciprocating the LOUIS A. ALEXANDER.

Witnesses:

ARTHUR W. BUNER, H. F. Wmnnonn.

